 | Maryland Geological Survey - Geology - 1898 - 630 pages
...surface of one of these rocks is of a lighter color than the natural rock face or polished surface. The impact of the hammer breaks up the granules on...grinding all these irregularities and reflecting surfaces arc removed, the light penetrating the stone is absorbed, and the effect upon the eye is that of a... | |
 | Geology - 1907 - 1026 pages
...and their polished surfaces are the physical properties of chief economic importance. Doctor Merrill" explains the cause of these contrasts very satisfactorily...the eye is that of whiteness. The darker color of a ]K)lished surface is due merely to the fact that, through careful grinding, all these irregularities... | |
 | Benjamin Kendall Emerson, Joseph Hartshorn Perry - Geology - 1907 - 700 pages
...and their polished surfaces are the physical properties of chief economic importance. Doctor Merrill" explains the cause of these contrasts very satisfactorily...The impact of the hammer breaks up the granules on (ho immediate surface, so that the light falling upon it is reflected, instead of absorbed, and the... | |
 | Geological Survey (U.S.) - Geology - 1907 - 244 pages
...their polished surfaces are the physical properties of chief economic importance. ^ Doctor Merrill" explains the cause of these contrasts very satisfactorily...: The impact of the hammer breaks up the granules 011 the immediate surface, so that the light falling upon it is reflected, instead of absorbed, and... | |
 | North Carolina. Geological Survey Section - Geology - 1906 - 382 pages
...surface of a rock of this type is of a lighter color than the natural rock face or polished surface. The impact of the hammer breaks up the granules on the immediate surface, not, it may be to the point of immediate disintegration, but enough so that the light falling upon... | |
 | United States - 1907 - 1200 pages
...their polished surfaces are the physical properties of chief economic importance. Doctor Merrill " explains the cause of these contrasts very satisfactorily...breaks' up the granules on the immediate surface, so thiit the light falling upon it is reflected, instead of absorbed, and the resultant effect upon the... | |
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Merrill0 explains the cause of these contrasts very satisfactorily : The impact of the hammer breaks up the granules on the immediate surface, so that the light falling upon it is reflected, instead of absorbed, and the resultant effect upon the eye is... 